html {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  padding:20px;
}
a {
  display:inline-block;
  background-color: #d3d3d3;
  padding:20px;
  border-radius:20px;
  margin:5px;
  text-decoration: none;;
}

model {
    width: 400px;
    display: block;
    height: 400px;
  }
  pre {
    background-color: rgb(213, 213, 213);
    display: inline-block;
    padding: 10px;
  }